Three friends who study martial arts find themselves defending humanity from a criminal mastermind and his invading army from another dimension. An American kids show by Saban Entertainment adapting footage from Toei's Metal Hero franchise (specifically Chojinki Metalder, Jikuu Senshi Spielban, Uchuu Keiji Shaider and Uchuu Keiji Gavan) similar to how Mighty Morphin' Power Rangers adapted Kyoryu Sentai Zyuranger footage..